Adjustable straightedge



, April 17, 192s.

' B. E. MCLAUGHLIN ADJUSTABLE STRAIGHTEDGE Filed Dec. 28 1926 Inventor i `Thisiinvention:relatesl Jto'improvements lin v j the constructionofafstraight' edgeyparticu- Patenteclilpr.n 17., Y

Y Bientina-1JE. .iacnauennrin .on M-nLnosEQrARi/g ILLINQQI'S. l' j f ".AAnJnsTA'BLE] satanrea-rcrunen?'LV Appnation filed neeemberfza-iszerseraljnqfl'ifgsosf larly; adapted frm-usel by, paperhangers.-

In practicing the' art of paper: hanging, itV is essential for 'good workmanship that' the-L straight edges used to trim the paper; shall v have as nearly Va perfectly "straight'edge4 from. `end to end,A as possible fonobt'ainingfa true edge o n pl per trimmed, forV purposes 'well 4known'in the art.' Q

"It is an vobject of ythis 'invention to pro# vide a-straight edge fofrpaperA hangers usev ywhich `is adjustable in vorder` that it"v may i be set" true bythe paper hanger at4 frequenti in-A terva-ls, wherever the edgeissetup Vfor trim*- h'angers are known to get out offtrue duezto in which -thef edge is setup4 for Va special cuttingjjob.""The provision ofthe adjustable: ,straight edge of this Vinvention overcomes 25.4 v Y Y this difficulty.

. A further. object of-"the inventio'nresides., i I j j termined spacednterva'ls the UlshapedH inprov-idingga ,straightedge and construction for paperfhangers7 'use which' is of "the" mostL simple n structure,'v in.. order to produce: a

straightA edge which may-l be made ,ati a su'bstantially low cost,V and"wli`ich"at` the same time, may be readily adjustedwith the use'- oftools-already used by paper hangers vin their work, so that the edge may be readily' "-'trued in a minimum of time.

The invention comprehends Vnumerous y other objects residing inthe details, of con"- v struction, and the arrangement of the parts,

" whichl are more particularly 'pointed out'in theV following detailed descriptionv andV v claims directed to a preferred form of theinvention, it being understoodhowever,rthat various changes in the size,L shape, and arlrangement of the parts may be made Vwithout departing from the spirit and scope of the invention as herein set forth.V

In the drawing vforming a part of this application Y Figure l is a plan View of the improved straight edge forming the subject matter of this invention. Y

Fig. 2 is a side elevation thereof. Fig. 3 is a vertical sectional view taken on "the une 3*?. 0f Fig. 2.-

Fig'A is a diagrammatic View -used for il- .intoithematerialthereof:

indicated at l2, are threaded -in any desirable lustrating how thelistraliglitedge j f linf-accordaneeewfith' this in'venti'on. V j The straight `edge@includes abodyly meme' ber llmade up of pluralityfoffelongatediin#L terlock'edpiecesfto provide/arigidconstruc 6o v ti'oniofthe body'member.- which has the lstripe-2 "s'ecured to `-onef-edge" thereof-iin order-f 1 and iis positionedfatthe oppositesideedgiy y .n "thereoffas'clearlyshownin Fig-IV "This'stripv` mei-nber.f3I has rabbeted grooyggfrmedf 70.

in one face -thereof-aseindieatedatfopenfing.

Ulshafp'ed barf member-f 5 .of sHu-itahlef:`

through thesi-de edge towardthe'hodyinem'-, l

strip memberwliichisfsliowninFigS, and* suitably' secured to 'the strip i by. screws 6 i at"V predetermfin'edl spaced` 'intervals;` thread'edl f member 5 over the' edge'portiongithe" strip 3f rear of theseo-penings 'isi'formedwitl a 'pliP rality of small bores 8 terminating inthe rear of the strip in enlarged sockets 9.. Ard` justing screws llOKKhave the'shanll portions extending through the bores `8,'whlichf are in axial alinement with the lopenings 7 and the. headsll positioned in the enlarged sockets 9, while the end portions .of the shanksas i' `mannerfor threaded engagement in the body f '95 member lof the straight edge. This structure Vis yshown particularly in Y Fig. 3, and it'will be noted that the mount` 1 ingk of the adjusting screw l0 is such Ythat the fitin 'the strip 3 is .substantially tight 100 `and without any play or looseness, but it is to be vunderstoodxthat the screws IOare freely` rotatable in thissassembled*positionin Y In the use of thestraight'edg'e forming this 110,-

metalpreferablyfbrass, isemountedbfover th75 kf Suitabley screw members 13 aremountedglo' 4 i Vinvention, the paper hangerupon setting up the body member l of the edge .on the job,

willrst adjust the vopposite end of the strip' ,membeig by operating the set .screws nearest then ends of the edge so as to set the ends of the strips '3 to the proper gauge for the work to be done. rlhis setting of the ends ont the strip member is illustrated Y to the strip member,

" straight edge for the work.

'j straight edge get out ofadjustment, it may A the U-s'haped member 5- cooperate As a result, the cord 15 which is stretched tight or-taut, and the careful setting of the strip member 3 will provide Athe proper Should the be readily reset in the same manner. lt willrthus be seen that a highly simple form of straight edge construction has been yprovided in which a screw member 10r and withthe strip 3 to provide an adjustable straight edge j structure wh construction, efficient in operation, and of a character that it vmay be readily adjusted by the ordinary screw driver insertedthrough the opening 7 in the Li-shaped member 5.

Having tlius `described my invention,

A I. An adjustable straight edge c0mpris'} v ing` a body member,

screw members rotatably journaled in the a flexible strip `member,

ich highly simple inr "weee/i4 flexible strip member having engagement in the body member for axial movementtherein upon rotation to adjust the strip member relative thereto, and a retaining member mounted on the edge of the strip member for retaining said strip member and the ad-V justing screw members in assembled relation.

2. Ani-adjustablestraight edge compris-V ing a body member, a strip member extending Athroughout. the length of the body member` at onesl ing screws rotatably mounted yin the strip member and Athreadedly mounted Y in the bodypmember, and a retaining member ap-l plied to the strip .member for retaining the ide portion thereof, adjust` screw members and strip member -in assembed relation.

n adjustable straight edge, comprising a base member, an adjustable strip member at one side of the base member, a

U-shaped member mounted over the edgepoifv theA adjustablestrip member and rigidly secured thereto, and edly mounted in adjusting screws thread the strip member and retained in assembled `relation by said` U- i shaped member, having threaded engagement with the b upon rotation, to vary'the position ot the strip member adjacent the body member. t

.4. An adjustable lstraight edge v'comprising a'body ,member, a flexible strip member, means for adjustably attaching said flexible strip member to the'body member,

and means carried by the flexible strip member adapted Jfor cooperation therewith to indicate any deviation from a straight line along the edge of saidV strip member.

n In testimony whereof I affix my signature. ABERNARD E. MOLAUGHLIN.

ody member and adapted; 

